He won't "die" until like the 3rd or 4th episode of the next season, because he'll be tested on by the maester that saved Jaime's hand. Also, like pipeworks said he may come back, but it's speculation, but it's pretty obvious it's Gregor

the largest militarial battle in human history was fought by america in ww2. Okinawa japan. there were the standard military strategies and tactics and whatnot. but when you got right down to it we were so overwhelmingly powerful and the enemy was so ridiculously stubborn. it was the ultimate IRL example of an unstoppable force meeting an immovable object. and we came out on top. (further points are that this battle was the reason we nuked japan. we won okinawa sure but that was just okinawa and we dwarfed the next largest battle in human history by several levels. imagine what it would take to invade the mainland of japan? so we said fuck it and nuked em)